Registro IPv4
host: b217.com
class: IN
ttl: 600
type: A
ip: 154.215.107.19

Servidores DNS Principal (mname) y Secundario (rname)
host: b217.com
class: IN
ttl: 7200
type: SOA
mname: n1.xundns.com
rname: nsadmin.xundns.com
serial: 437896
refresh: 3600
retry: 600
expire: 86400
minimum-ttl: 600